Medicament delivery device comprising a movable guard (10) being movable between a proximal and a distal position and a locking mechanism (15) having a lever (16), the lever (16) restricting movement of an actuation locking member (24) until the movable guard is positioned in a distal position and the lever (16) restricting movement of the guard (10) in a proximal position after actuation of the device.藥物輸送裝置包括可移動的防護件(10),其可在近側與遠側位置之間移動;及鎖定機構(15),其具有槓桿(16),該槓桿(16)限制致動鎖定構件(24)之移動,直至該可移動的防護件被定位在遠側位置中,且該槓桿(16)在該裝置的致動之後限制該防護件(10)於近側位置中之移動。10‧‧‧防護件11‧‧‧外殼13‧‧‧彈簧14‧‧‧夾具15‧‧‧鎖定機構16‧‧‧樑24‧‧‧鎖定構件30‧‧‧支臂34‧‧‧導引套筒37‧‧‧致動機構38‧‧‧構件39‧‧‧凹部40‧‧‧突出部份50‧‧‧驅動單元52‧‧‧驅動彈簧54‧‧‧驅動彈簧夾具56‧‧‧連接機件58‧‧‧支臂60‧‧‧卡鉤70‧‧‧藥物容器71‧‧‧針
